Some helpful materials for those reading.
There are two glories spoken of in 2 Corinthians 3.
[1] the glory of the law of God
[2] the glory of Moses face.
The context and the koine Greek endings demonstrate that the 2n glory was "done away" with.
Look:
2Co 3:6 Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.
2Co 3:7 But if the ministration of death, written and engraven in stones, was glorious, so that the children of Israel could not stedfastly behold the face of Moses for the glory of his countenance; which glory was to be done away:
2Co 3:8 How shall not the ministration of the spirit be rather glorious?
2Co 3:9 For if the ministration of condemnation be glory, much more doth the ministration of righteousness exceed in glory.
2Co 3:10 For even that which was made glorious had no glory in this respect, by reason of the glory that excelleth.
2Co 3:11 For if that which is done away was glorious, much more that which remaineth is glorious.
There are several things in 2 Corinthians 3.
[1] Law (God's Ten Commandments, His Character, doesn't change, stays, "remaineth")
[2] ministration (changes), how the Law is administered
[3] glories (differing glories)
The glory of the Law as seen in Moses face goes away
the glory of the Law in the life and face of Jesus Christ remaineth and is more glorious.
2Co 4:4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.
2Co 4:5 For we preach not ourselves, but Christ Jesus the Lord; and ourselves your servants for Jesus' sake.
2Co 4:6 For God, who commanded the light to shine out of darkness, hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ.
[4] Mediator (differing mediators)
Moses ('old covenant'; Exodus 19:8)
Jesus (eternal covenant; Malachi 2:5; Jeremiah 31; Hebrews 8, etc)
[5] location (differing locations)
tables of stone
tables of the fleshy heart (the brain is two hemispheres, two tables)
[6] Holy Ghost (doesn't change)
The Law of God brings death, why?
Rom_6:23 For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord.
Jas_1:15 Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death.
1Jn 3:4 Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law.
Rom_7:10 And the commandment, which was ordained to life, I found to be unto death.
But it was ordained to Life, not death.
Through the Holy Ghost, who writes the "my (God's) law" upon the heart, the Law is able to be fulfilled in the life:
Rom_8:4 That the righteousness of the law might be fulfilled in us, who walk not after the flesh, but after the Spirit.